better error messages for failed index, #858

backend/channel/src/index.py

@@ -42,6 +42,10 @@ class YoutubeChannel(YouTubeItem):
         if not self.youtube_meta and fallback:
             self._video_fallback(fallback)
         else:
+            if not self.json_data:
+                message = f"{self.youtube_id}: Failed to get metadata"
+                raise ValueError(message)
+
             self.process_youtube_meta()
             self.get_channel_art()